Located equal distance Equal Distance from Washington, D.C. and Baltimore, residents and tourists alike have easy access to Baltimore Washington International Airport Thurgood Marshall Airport (BWI), Ronald Reagan Washington National Airport (DCA), and Washington Dulles International Airport (IAD). Practice Introduction:Anne Arundel Gastroenterology Associates (AAGA) provides high-quality GI care across our clinics located in Annapolis, Pasadena, Odenton, Bowie, Greenbelt, and Stevensville, Maryland.